218790414 has 12 divisors (see below), whose sum is σ = 474045936. Its totient is φ = 72930132.

The previous prime is 218790409. The next prime is 218790427. The reversal of 218790414 is 414097812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6077494 + ... + 6077529.

It is an arithmetic number, because the mean of its divisors is an integer number (39503828).

Almost surely, 2^218790414 is an apocalyptic number.

218790414 is an abundant number, since it is smaller than the sum of its proper divisors (255255522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218790414 is a wasteful number, since it uses less digits than its factorization.

218790414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12155031 (or 12155028 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 218790414 is about 14791.5656372137. The cubic root of 218790414 is about 602.5726698502.

The spelling of 218790414 in words is "two hundred eighteen million, seven hundred ninety thousand, four hundred fourteen".